498 



Sir J. Conroy. 



[Mar. 3, 



Silver films in carbon tetrachloride. 



Eed light. Yellow light. Blue light. 







P.I. 



P.A. 



P.I. 



P.A. 



P.I. 



P.A. 







o 



o / 



/ 



o 











o / 





r Plate at A. 



69 20 



35 30 



65 59 



QA 





OU 



OO 



34 59 



I. 



< Plate at B. 



65 13 



33 24 



64 20 



34 



54 



61 



31 



34 40 





L Mean value 



67 16 



34 27 



65 19 



34 



36 



61 



13 



34 49 





T Plate at A. 



69 38 



39 51 



66 29 



QO 



AQ 



ol 



AG 



37 54 



II. 



{ Plate at B. 



64 30 



38 59 



65 20 



o7 



OK 

 ZD 



CO 

 OA 





38 14 





*- Mean value 



67 04 



39 25 



65 54 



OO 



38 



07 



oL 



01 



38 04 





r Plate at A. 



68 21 



40 42 



64 30 



39 



12 



60 



26 



37 39 



III. 



1 Plate at B. 



63 20 



40 22 



64 09 



40 



14 



60 



57 



38 22 





<* Mean value 



65 50 



40 32 



64 19 



39 



43 



60 



41 



38 





(" Plate at A. 



68 54 



41 20 



65 05 



40 



C 



61 



05 



38 21 



IV. 



■1 Plate at B. 



63 56 



40 24 



64 46 



39 



45 



61 



46 



40 50 





L Mean value 



66 25 



40 52 



64 55 



39 



52 



61 



25 



39 35 



Five similar glass slips were silvered in the same manner, being 

 removed from the silvering solution after 7, 10, 13, 16, and 19 minutes, 

 and the reflexion constants for air determined. The thickness of the 

 films was not ascertained, as they were required for some other experi- 

 ments, and were therefore kept. 



Silver films in air. 

 Eed light. Yellow light. Blue light. 



{Plate at A. 

 Plate at B. 

 Mean value 



r Plate at A. 

 YI. i Plate at B. 



I Mean value 



r Plate at A. 

 VII. i Plate at B. 



I Mean value 



{Plate at A. 

 Plate at B. 

 Mean value 



r Plate at A. 

 IX. i Plate at B. 



I Mean value 



P.I. 



P.A. 



P.I. 



P.A. 



P.I. 



P.A. 



o 













o 









73 







30 



25 



69 37 



31 



32 



66 48 



33 11 



68 



27 



28 



10 



70 02 



30 



52 



66 24 



32 17 



70 



43 



29 



17 



69 49 



31 



12 



66 36 



32 44 



73 



18 



37 



10 



69 50 



38 



07 



66 42 



38 29 



68 



39 



37 



36 



68 47 



37 



31 



66 04 



37 35 



70 



58 



37 



23 



69 18 



37 



49 



66 23 



38 02 



74 



06 



41 



24 



70 49 



41 



14 



67 32 



40 



69 



53 



40 



49 



70 10 



40 



47 



66 32 



40 04 



72 







41 



06 



70 30 



41 







67 02 



40 02 



74 



43 



41 



20 



71 25 



41 



54 



67 41 



41 02 



70 



13 



41 



25 



70 51 



40 



24 



66 56 



40 52 



72 



28 



41 



22 



71 08 



41 



09 



67 18 



40 57 



75 



21 



42 



20 



71 47 



42 



24 



66 36 



42 09 



70 



42 



42 



32 



70 47 



42 



19 



67 25 



41 52 



73 



01 



42 



26 



71 17 



42 



21 



67 



41 



